Feeder Size Calculator

May 22, 2024 Post a Comment

Feeder size calculator

How do you determine cable wire size? Divide the voltage running through the cable by your target current. If, for instance, 120 volts will act on the cable, and you want 30 amps to run through it: 120 / 30 = 4.

What size wire do I need to run 50 amps 100 feet?

In most cases, 6 AWG is an almost perfectly-sized wire for a 50 amp breaker. In limited cases, you will probably have to use a larger 4 AWG wire. That's when you have a long circuit and are sending electrical current at some distance (100 feet or more).

What size wire do I need for 50 amps?

50 AMP Wire Size For a maximum of 50 amps, you'll need a wire gauge of 6. Fifty amp breakers are most often used to power many different appliances. However, a kitchen oven can alone require 50 amps.

What size wire do you need for 150 amp service?

SERVICE ENTRANCE CONDUCTORS SIZE AND RATING
Service or Feeder Rating	Copper Conductors	Aluminum or Copper-Clad Aluminum
100 Amps	#4 AWG	#2 AWG
125 Amps	#2 AWG	#1/0 AWG
150 Amps	#1 AWG	#2/0 AWG

Can wire size be too big?

If a wire gauge is “too big” then it is a lot more expensive and is harder to bend, as well as more difficult to attach with wire nuts or to switches. Other than that, not much of anything.

What size wire do I need for 30 amps?

Many techs will repeat these rules of thumb and rely on them in all circumstances: “Twelve-gauge wire is good for 20 amps, 10-gauge wire is good for 30 amps, 8-gauge is good for 40 amps, and 6-gauge is good for 55 amps,” and “The circuit breaker or fuse is always sized to protect the conductor [wire].”

Will 8 gauge wire carry 50 amps?

8 AWG may carry a maximum of 70 Amps in free air, or 50 Amps as part of a 3 conductor cable.

How Far Will 6 gauge wire carry 50 amps?

Your standard wire size chart will tell you that 6 AWG wire, which is rated for 55 amps, should be the wire size for 50 amp circuits. At 50 feet, that should be fine. You can consider that as the maximum limit for how far will 6 gauge wire carry 50 amps safely.

Will 2 10 gauge wire carry 50 amps?

One type uses copper and the other uses aluminum. 10 Gauge wire can not handle 50 amps. The maximum rating on 10 gauge is 30 Amp.

What size wire do I need to run 50 amps 200 feet?

Calculating With Voltage Drop Considered On the off-chance that your panels are rated at 110V/120V, the right wire size for 50 amp sub panel should be bumped up to 2 AWG copper or 1/0 AWG aluminum for 200 ft.

What size wire do I need to run 50 amps 150 feet?

To run 50 amps at 150 feet, you can use No. 4 AWG. The larger the wire diameter is defined by the smaller numbers on a wire.

What size wire do I need to run 40 amps 100 feet?

This wire has a 65A ampacity and can handle 60 amps quite easily. That's why we use #6 AWG wire for 40 amp service 100 feet away.

What size wire is good for 200 amps?

The Short Answer: For a 200 amp service, you'll need a #4/0 aluminum wire.

What size wire is good for 200 amp service?

200-Amp Service Wire Size According To The NEC When installing a 200-amp panel, the National Electrical Code requires a minimum of a #2/0 AWG for copper wire. If you are using aluminum, or copper-clad wire no smaller than a #4/0 AWG must be installed.

What size wire do I need for 200 amp service 150 feet?

The 250 KCMIL wire is the perfect size wire for 200 amp service because it has 255A ampacity (a minimum of 250A ampacity requirement is satisfied).

What happens when wire is undersized?

If the wires are undersized, there will be a significant voltage drop in the wires resulting in excess power loss. In addition, if the wires are undersized, there is a risk that the wires may heat up to the point in which a fire may result. An electrical wire carries current much like a water hose carries water.

Do thicker wires get hotter?

The resistance of a wire depends on its thickness and length. The longer the wire the greater the resistance offered to the flow of charge. Thick wires have less resistance than thin ones. Current tends to create heat in high resistance wires.

What happens if you use the wrong wire size?

Using a wrong wire gauge leads to heat resistance, which can quickly turn into a fire hazard. Notably, each cable is designed to accommodate a specific amount of voltage ideal for a given application. If you use an inappropriately sized wire, it may end up melting due to the high amounts of flowing current.

Can I use #8 wire for 30 amp?

In short, the perfect wire size for most 30 amp services is the #8 AWG wire with 50A ampacity. This is the common size wire for 30 amps 240 volt service, 30 amp 220 volt service, and so on.